bpo-32622: Native sendfile on windows (GH-5565)
* Support sendfile on Windows Proactor event loop naively.
(cherry picked from commit a19fb3c6aaa7632410d1d9dcb395d7101d124da4)
Co-authored-by: Andrew Svetlov <andrew.svetlov@gmail.com>
diff --git a/Lib/asyncio/windows_events.py b/Lib/asyncio/windows_events.py
index f91fcdd..d22edec 100644
--- a/Lib/asyncio/windows_events.py
+++ b/Lib/asyncio/windows_events.py
@@ -4,6 +4,7 @@
import _winapi
import errno
import math
+import msvcrt
import socket
import struct
import weakref
@@ -527,6 +528,27 @@
return self._register(ov, conn, finish_connect)
+ def sendfile(self, sock, file, offset, count):
+ self._register_with_iocp(sock)
+ ov = _overlapped.Overlapped(NULL)
+ offset_low = offset & 0xffff_ffff
+ offset_high = (offset >> 32) & 0xffff_ffff
+ ov.TransmitFile(sock.fileno(),
+ msvcrt.get_osfhandle(file.fileno()),
+ offset_low, offset_high,
+ count, 0, 0)
+
+ def finish_sendfile(trans, key, ov):
+ try:
+ return ov.getresult()
+ except OSError as exc:
+ if exc.winerror in (_overlapped.ERROR_NETNAME_DELETED,
+ _overlapped.ERROR_OPERATION_ABORTED):
+ raise ConnectionResetError(*exc.args)
+ else:
+ raise
+ return self._register(ov, sock, finish_sendfile)
+
def accept_pipe(self, pipe):
self._register_with_iocp(pipe)
ov = _overlapped.Overlapped(NULL)